On Mon, Dec 3, 2018 at 5:47 AM Yu Chen <chenyu56@xxxxxxxxxx> wrote:
>
> This driver handles usb hub power on and typeC port event of HiKey960 board:
> 1)DP&DM switching between usb hub and typeC port base on typeC port
> state
> 2)Control power of usb hub on Hikey960
> 3)Control vbus of typeC port
> +config HISI_HIKEY_USB
> + tristate "USB functionality of HiSilicon Hikey Platform"
> + depends on GPIOLIB
> + default n
No, Linus is not happy about this.
Default n _is_ a default.
> + help
> + If you say yes here you get support for usb functionality of HiSilicon Hikey Platform.
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * hisi_hikey_usb.c
> + *
> + * Copyright (c) Hisilicon Tech. Co., Ltd. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
Same comments to the above lines.
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +#include <linux/platform_device.h>
> +#include <linux/of.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/usb/role.h>
> +#include <linux/notifier.h>
Order?
> + pr_debug("%s: set hub power %d\n", __func__, value);
Noise.
> + pr_debug("%s: switch to %s\n", __func__, switch_to_str);
Noise.
> + pr_debug("%s: set typec vbus gpio to %d\n", __func__, value);
Noise.
> + if (!nb)
> + return -EINVAL;
On which conditions this happen?
> + pr_info("%s:set typec state to %lu\n", __func__, state);
Noise!
Guys, you perhaps can read about tracepoints and function tracer
facilities in the kernel.
> +static int hisi_hikey_usb_probe(struct platform_device *pdev)
> +{
> + pr_info("%s: typc_vbus_enable_val can't get\n", __func__);
Noise!
> + if (IS_ERR_OR_NULL(hisi_hikey_usb->typec_vbus)) {
So, this check is redundant. You are repeating it below.
> + if (!hisi_hikey_usb->typec_vbus)
> + ret = -EINVAL;
> + else
> + ret = PTR_ERR(hisi_hikey_usb->typec_vbus);
> + return ret;
> + }
> + if (IS_ERR_OR_NULL(hisi_hikey_usb->role_sw)) {
> + pr_err("%s: usb_role_switch_get failed\n", __func__);
Noise and same comment to the conditional check as above
> + if (!hisi_hikey_usb->role_sw)
> + ret = -ENOENT;
> + else
> + ret = PTR_ERR(hisi_hikey_usb->role_sw);
> + return ret;
> + }
> + .of_match_table = of_match_ptr(id_table_hisi_hikey_usb),
Does it compiles for non-OF case? Why macro is in use?
--
With Best Regards,
Andy Shevchenko
